What You Need to Know About Apache Struts and CVE-2023-50164

CVE-2023-50164 is a significant vulnerability in the Apache Struts web application framework, discovered on December 7, 2023, that can potentially lead to path traversal and remote code execution. The flaw arises from the mishandling of HTTP parameters during file uploads, allowing attackers to upload arbitrary files to unintended directories, potentially executing malicious code on the server. This vulnerability is exacerbated by the presence of proof-of-concept exploits on GitHub repositories, with observed exploitation attempts starting December 12. There is some confusion over which versions are affected, as the GitHub Advisory Database and Open Source Vulnerability (OSV) database list certain versions, while the official advisory includes different end-of-life releases. Users of Apache Struts are urged to prioritize identifying and updating affected applications to mitigate the risk, drawing lessons from the Equifax data breach in 2017, which was attributed to a similar Struts vulnerability.

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